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18:12 Mar 6, 2012 |
Norwegian (Bokmal) to English translations [PRO] Tech/Engineering - Ships, Sailing, Maritime | |||||||
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| Selected response from: Erik Matson Thailand Local time: 14:04 | ||||||
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5 | brake / shaft horsepower |
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brake / shaft horsepower Explanation: Brake horsepower Brake horsepower (bhp) is the measure of an engine's horsepower before the loss in power caused by the gearbox, alternator, differential, water pump, and other auxiliary components such as power steering pump, muffled exhaust system, etc. Brake refers to a device which was used to load an engine and hold it at a desired RPM. During testing, the output torque and rotational speed were measured to determine the brake horsepower. Horsepower was originally measured and calculated by use of the indicator (a James Watt invention of the late 18th century), and later by means of a De Prony brake connected to the engine's output shaft. More recently, an engine dynamometer is used instead of a De Prony brake. Although the output delivered to the driving wheels is less than that obtainable at the engine's crankshaft, a chassis dynamometer gives an indication of an engine's 'real world' horsepower after losses in the drive train and gearbox. This gives a reasonably accurate indication of how a wheeled vehicle engine will perform once on the road. Shaft horsepower Shaft horsepower (shp) is the power delivered to the propeller shafts of a steamship (or one powered by diesel engines or nuclear power), or an aircraft powered by a piston engine or a gas turbine engine. This shaft horsepower can be measured with instruments, or estimated from the indicated horsepower and a standard figure for the losses in the transmission (typical figures are around 10%). This measure is not commonly used in the automobile industry, because there, drive train losses can become significant. From Wikipedia, the free encyclopedia Example sentence(s):
Reference: http://en.wikipedia.org/wiki/Horsepower#Shaft_horsepower Reference: http://wiki.answers.com/Q/What_does_BHP_or_brake_horse_power... |
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